Send a dynamic newsletter using an API

When we say an issue of a dynamic newsletter, we are saying that an email has been sent out, correct? I just want to understand that an issue is an email of a dynamic newsletter.

Is this the right API to send a dynamic newsletter as an email via the API?
https://docs.kentico.com/display/API9/Email+marketing#Emailmarketing-Creatingadynamicnewsletterissue

What if I want to send a dynamic newsletter or an issue of a dynamic newsletter to a single user and not to everyone in the subscriber list? Would I use this method? http://devnet.kentico.com/docs/9_0/api/html/M_CMS_Newsletters_IssueSender_Send_2.htm

The above is what I want to do. To send an email of a dynamic newsletter using the API to an email address who may not be a subscriber in the system.